The U.S. Department of Transportation (DOT) has made it very easy to find union-made tires by requiring that each tire carry a code that shows the company and the location of the plant that manufactured the tire. DOT requires that each tire sold in the United States carry a code that looks something like this: DOT BE XX XXX XXX. The two letters or numbers that follow the DOT identify a particular factory as listed below.

• BE: B.F. Goodrich, Tuscaloosa, Ala.
• BF: B.F. Goodrich, Woodburn, Ind.
• VE, YE, YU, 8B: Bridgestone/Firestone, Des Moines, Iowa
• D2, E3, W1, Y7: Bridgestone/Firestone, La Vergne, Tenn.
• 2C, 4D, 5D: Bridgestone/Firestone, Morrison, Tenn.
• UP: Cooper, Findlay, Ohio
• UT: Cooper, Texarkana, Ark.
• JU, PC, UK: Goodyear, Medicine Hat, Alberta
• JJ, MD, PU: Goodyear, Gadsden, Ala.
• DA: Dunlop, Buffalo, N.Y.
• JN, MJ, PY: Goodyear, Topeka, Kan.
• JE, MC, PT: Goodyear, Danville, Va.
• JF, MM, PJ: Kelly-Springfield, Fayetteville, N.C.
• CF: Titan Tire, Des Moines
• JH, MN, PK: Titan Tire, Freeport, Ill.
• B plus serial #: Titan Tire, Bryan, Ohio
• CC: Yokohama Tire, Salem, Va.

All tires made at the above locations are made by members of the United Steelworkers (USW). Make sure you use this easy-to-follow guide to buy union-made tires.